Q re hosting (no don't spam me!)

[ponygirl]

ok, so now that I'm submitting more & whatnot, I look at my bandwith and WHOA!
I'm burning about 5x what I was 2 months ago & it's gonna cost me a fortune in overages (well a fortune to me hehe )

so I'm looking around at previous posts here to compare virtual packages and see that there is a great discrepancy in pricing ie:
one host offers 100gb/month for $80, another for $20. both plans look pretty similar & have everything else I need, both are reputable.

so my question is...why the huge discrepancy? I need some advice before I jump the current ship into unknown, ya know

any thoughts?

thanks in advance,
Ponygirl